Anoto Ab

Peter Gredinger

Ola Strömberg

Mattias Bryborn

Stefan Burström

Magnus Horrdin

Ola Wassvik

Thomas Craven-Bartle

Ola Wasswik

A control device is used in a method for controlling the pen based on an analog measuring signal from the force sensor by a processor comparing the analog measuring signal with a fixed reference signal and, based on the comparison, selectively initiating conversion of the analog measuring signal into a sequence of digital force values.

Electronic pen, and control device and method thereof

A modular unit is designed for an electronic pen. The modular unit comprises a carrier () with a receiver for a writing implement, a printed circuit board (), a two-dimensional radiation sensor () mounted on the printed circuit board, and an imaging unit () which defines an image plane. The carrier (), the printed circuit board (), and the imaging unit () are joined together with the imaging unit () facing the radiation sensor () to locate the image plane at the radiation sensor (). The modular unit may comprise an analysis system dedicated to a particular optical analysis application, such as position determination based on images of a position-coding pattern. A radiation source, such as an LED or a laser diode, may be arranged on the printed circuit board or mounted in a holder on the imaging unit. The imaging unit () may be implemented as a boresight unit for controlling the spatial origin of radiation transmitted towards the radiation sensor (). The boresight unit may comprise a radiation-transmitting channel, an imaging lens, and a redirecting mirror in the channel.

Optical system, an analysis system and a modular unit for an electronic pen

An electronic pen has a force sensor whose electrical resistance varies in accordance with the amount of force applied to the pen stem of the pen. The force sensor is a modular unit with an electrode and a closure, which are mutually arranged in an essentially electrically insulated initial position. The closure, which conveniently is cantilevered on the electrode, is adapted to receive axial forces from the pen stem and thereby to be urged to an activated position in electrical contact with the electrode. The closure is also arranged, on relaxation of the axial forces, to automatically spring from the activated position back to the initial position.

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Skurup, Sweden

Peter Gredinger